comp. ratio questions

Drowzysleeper · Post by **Drowzysleeper** » Tue Mar 06, 2007 2:40 am

is there a way to tell what compression ratio i have. the motor i bought has aftermarket pistons, the guy said it was built for nos. he couldnt remember if ther were 9.5to1 or 10to1. its an ls motor so i figure that if the pistons are 10 to 1 the would be flat top pistons, and if they are 9.5to1 they would look similar to the stock ones. now does that sound right? or am i completely wrong. also if i took the head of for that i would have to replace it wouldnt i. any help would be great.... thank in advance

shawn

freakchris03 · Post by **freakchris03** » Tue Mar 06, 2007 2:41 am

sounds like high compression pistons to me. it has to be 10.1

95_gsrfodo · Post by **95_gsrfodo** » Tue Mar 06, 2007 2:46 am

hum hard to tell without seeling the pistons may have to pull the head ortalk to who u got it from??

Drowzysleeper · Post by **Drowzysleeper** » Tue Mar 06, 2007 3:03 am

yeah the guy i bought it from said that he bought it that way, and is tryin to get ahold of the guy.. i think either way im gonna boost it probably about 5 psi lol just to be safe. i have heard of people boosting 10to1 compression but they also had a bad ass tune

bildo16 · Post by **bildo16** » Tue Mar 06, 2007 3:17 am

it would be very hard to tell even by looking at them. different companies use different designs.

Drowzysleeper · Post by **Drowzysleeper** » Tue Mar 06, 2007 3:24 am

true you might know the guy he is from troy he drives a white 240 i think his name is joe

bildo16 · Post by **bildo16** » Tue Mar 06, 2007 3:45 am

Drowzysleeper;27535 wrote:true you might know the guy he is from troy he drives a white 240 i think his name is joe

lol, the 240 with torque thrusts, lol, i know joe. hes a pretty standup guy, so im sure you will get the answers you are looking for. i would also spend the money to get the motor re-balanced, ive heard some things of it. i would just spend the money to have it done. wink, wink.

Drowzysleeper · Post by **Drowzysleeper** » Tue Mar 06, 2007 3:50 am

are you saying it needs to be rebalbanced?

bildo16 · Post by **bildo16** » Tue Mar 06, 2007 3:51 am

im saying i heard that it was never balanced in the first place. thats just what i heard, but i wouldnt take the chance, unless hes got some documentation.

Drowzysleeper · Post by **Drowzysleeper** » Tue Mar 06, 2007 3:55 am

thanks for looking out.